1. Update Windows Defender with Windows Update:
Open the Control Panel, change the view to small icon, locate Windows Update and open, check for updates, click an optional update, find the Windows Defender item in the update list, and then tick and install the update after displaying the available updates.
2. Check for updates with Windows Defender:
Similarly, Windows Defender can be found in the Control Panel, open, click on the white triangle above the icon interface, select "Check for Updates" In the menu that appears, and update Windows Defender as prompted.
You can update Windows Defender in both ways, but sometimes relying only on Windows Defender to check for updates and not update to the latest version, it is recommended that you update Windows Defender by using Windows Update First ( If the update is displayed, check the updates in Windows Defender and make sure the upgrade is successful.